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When you make up things to be a bitch about. Also known as BS.

Extreme cases can morph into the dreaded and incurable Cuntausen Syndrome.

Bitchausen Syndrome by Proxy occurs when someone is forced to interact with the individual suffering from BS.
She appears to be suffering from Bitchausen Syndrome as she is hysterical and arguing with me over something that only happened in her head!
by Rene Riley September 25, 2018
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